> > ok gotcha, good start. Then you have:> > bob --- is_friends_with ---> tom> tom --- is_friends_with ---> bob> > What if I wanted to record a different sentence - "A person called> John is friends with Frank within the remit of Work"? (i.e. they aren't> friends outside of workhours)

A better question would be to ask if the requirements change and one
needs to record when the friendship began, how does dbd record the bob
and tom have been friends since October 12, 1993 ?

One of course has to record that fact to answer questions like: What is
the average duration of current friendships? What percentage of
friendships last more than 15 years? Who began a friendship on October
12, 1993 ? etc.